Work guiding and feeding attachment for band saws



5 H 5 l E a m s 2 m h S V 3 5 8% Nov. 28, 1944. 'H. PETERSEN WORKGUIDING AND FEEDING ATTACHMENT FOR BAND SAWS Filed ma :51, 1945 Nov. 28,1944. N H. PETERSEN 2,363,745

WORK GUIDING AND FEEDING ATTACHMENT FOR BAND SAWS Filed May 31, 1943 3Sheets-Sheet 2 3M Hans F2 z rsgn H. PETERSEN WORK GUIDING AND FEEDINGATTACHMENT FOR BAND SAWS 3 Sheets-Sheet 5 Nov. 28, 1944.

Filed May $51. 1943 Patented Nov. 28, 1944- MEN'r FORBAND SAWS g HansPetersen, Minneapoll'sjMinn; assignor to l t OontinentaIQMachines',"Incorp0rated,Minne 1,

apoli s', Minn, a corporation of Minnesota Application Ma -s1;1943,;SerialNot489,165 ream; tome- 68')" invention relates to band' sawsand refers particularly to a work feeding and guiding at-v tachmentespecially adaptedfor .use with metal.

cutting band saws.

It: is an object of this invention to providean, attachment which ma bequickly attached to.

the work supporting" table of 'a band saw and 1 by which' various'typesv or work and particularly mitering operationsare facilitated; .r

="-An'other object of this, invention is'; to provide an attachmentof:thecharacter described incorporating a manual feed which maybe quicklyand easily disengaged 'to permit the use: of

ingr thea waynin'lwhichz the attachment isused for :Figure 4 an enlargedplan view of: the en the attachment with parts; broken awa and-rin- :Jsection; =Figure 5 isJ-a' side view of theattachmen't in.

position on thei'worksupporting table of a band.

the power feedwith which metal cutting band" saws-are generally equippedorto permit quick,v adjustment of the work engaging uide or miterz bar.Another object ripping and'cuttin g ofl' "inf addition to miteringoperations; i 1

, still anotherobjecfof *this; invention is to provide an attachment ofthe character described which is" rugged and well adapted for the'purpose for which it is intended,

With the above and other ,objectyirr "view which will appear 'as thedescription proceeds;

this invention resides in the novel construction, combination andarr'angementof parts substan- -:F.'igure: is adetail cross sectionalvview. take Ir through:Figureionfthe'plane of the line 67-45;

Figure '7 is a detail cross sectional view'takerr' through. Figure;Onwthe plane of the lines 1-! andsillustratin'g the .mar-mer inwhichsthe. attachmentvis': adiustably secured to the Work'sup-.--portingtableoi. thevband saw; and. y 1 Figure 8 :is a detail crosssectionalviewtaken:

through Figure 5'on the plane of the.1ine:8:'8-..

' Reterring: now-more-'particularly'to" the accuttingjzband saw equippedwith the customary/1 ti'iallyas hereinafter described, and more'particmI 'larly defined by the appended harm, it being understoodthat suchchanges in the precise em- 40, bodinient of the hereindisclosedinvention may: b'ejmade' as; come within the scope of thejclaims,"I'heaccompanyingdrawings illustrate one co'r'njplete example of thephysical" embodiment 'ofthe invention constructed in accordance with thebest 3 niode so' fa rdevisedl for the practical appliczatlon v oi" theprinciples thereof, and in which:

Figure 1; is a perspective view illustrating "the" use'of' theattachmehtof this invention for 'cutting ofi stock and using the power feed-of themachine; y

Figure 2 is a perspective view 'of the attachment illustrating-themanner in which it is used inmitering operations; Y I Figure 3 is afragmentary 'plan view illustrathead base IS. ,The rods; l3 arethusrigidly' con-,

companying'. r drawings, in which like numerals indicate, like parts,thernumerali designate'ssthe" work: supportingtable of'a conventionalmetal saw= bandit. which is guided. to travel vertically throughthetable5 i v. Thes'attachment of the. invention.v indicated generally by: thenumeral. 1 is adapted towbexdeetachably and adjustably secured .to theWOI'klSllLl porting table 5. The main supportfortheattachment;comprises'aibracket 8 providedrrwith a. slideway 9' toreceivexaslide Hl fixed to theironte edge-of the work suppurtingtable.Cl mping: screws ll .are rovided. towreleas'ably' sec er the bracket inany position of adjustment alongthe:

slide l0. f i

{The bracket 9'hastwopara1lel spaced slideways flzslmounteda thereonandbored' to receive rods l3. At their outer endsithe rods [3 are.rigidly connected by a crossbar: anchored to the ends of .the-rodsas inanysuitable manner; The

opposite or inner ends'of the rods li3 xare secured v in dependingbosses IS on the bottom of amiter nected bythei miter head base It andthe cross bar l4 and together these parts "form: arigid Jra-me-likestructure slidably mounted on the" bracket. w Rotatable on the miterhead base [6 is, a. miterhead I! and rising. above the miter head is atpower feed chain. collar 18." A screw I9 thread ed infthe base I6 holdsthe miter head andcollar assembled with the base and locks the miterhead in any desired position of adjustment, such adjustment beingfacilitated by a scale 20 on the base and a gauge mark (not shown) onthefront' of the miter head.

- formin The miter head has an arm 2| extending radially therefrom towhich a miter bar support 22 is secured. This miter bar support has amiter bar or other work engaging member 23 secured thereto and whichwhen in use for mitering has a work stop 24 fixed thereto to support theend of the work as will be readily apparent.

In order to support the miter head base and the assembly carried therebfor free movement across the face of the work table, a slide pin or,

foot 25 is secured in the under face of a boss 26 When the attachment isto be used for ripping,.

the miter head is adjusted to its position at which the miter bar 23forms a ripping fence parallel with the rods l3 as clearly shown inFigon the bottom of the base [6 between the bosses necting the rods atone end; a work engaging face on said miter head; a feed screwjournalled in themeans connecting the rods and held against endwisemovement with respect thereto; a hand wheel on the feed screw; and a nutcarried by lithe bracket for engaging the feed screw so that ure 3. Whenused for this purpose the work stop 24 is of course removed to enablethe work to be fed through.

For mitering and cut ofis a work feed is .pro-

vided. This may be accomplished manually-by means of hand wheel 21 orthrough use of the power feed with which'the machine is equipped. Thepower feed forms no part of the presentinvention, but for purposes ofillustration includes a chain 28 or other tension member adapted to wraparound the work or the work guide and to.

exert a pull thereon. In the present case when the power feed is usedthe chain is engaged over the collar l8.

The hand wheel 21 .is fixed to a feed screw 29' having its endsjournalled in bearings carried by the cross bar l4 and the miter headbase IS. A.

nut 30 mounted on the bracket 8 actively engages the feed screw when itis desired ti use the manual feed.

The nut 30, as best shown in Figure 6, comprises two half sections 3|extending up from bosses 32. The bosses 32 have flanges 33 extending inopposite directions therefrom to be slidably received in guideways 34 inthe underside of two depending portions of the bracket as best shown inFigure 5. A shaft 35 extends through the bosses 32 and has stop collars36 and 3l'fixed to its opposite ends the former being provided with ahandle 38.

The meeting faces of the stop collars 36-31 and the adjacent ends of thebosses are formed with interengageable V projections and notches camssothat by rotation of the collars the bos es and half nut sections can bemoved toward each other.

A compression spring 39 seated in counterbores in the bosses 32yieldingly urges the same apart to maintain them in engagement with thestopcollars 36 and 31.

Through the provision of this split nut ar-' rangement the nut may bequickly engaged and nection with the accompanying drawings, it will bereadily apparent to those skilled in the art that this inventionprovides a practical and exceptionally handy attachment for metalcutting band saws and that the same may beused with rotation of the feedscrew slides the rods and the "work engaging face in a directionparallel with the axes of the rods.

2. A work feeding and guiding attachment for band saws and the likecomprising: a bracket attachable to the work supporting table of'theband saw; a pair of guideways rigidlymounted on the bracket; rodsslidably received in said guideways; means rigidly connecting-said rodsat both ends; amiterhead mounted onthe means connecting the rods at oneend; a work engaging face on said miter head; a feedscrew journalled inthe means connecting the rods'and held against endwise' movement withrespect thereto; a handwheel on the feed screw; a nut carried by thebracket for engaging the feed screw so that rotation of the feed screwslides the rods and-the work engaging face in adirectio-n parallel withthe axes of the rods, said nut being split;'and means for. quicklymoving the nut sections toward and from each other to quickly free thenut from or engage-it with the feed screw.

3. An attachment of the character described comprising: a pair ofparallel rods; a cross mem-,

' carried by the miter head; a bracket in which the rods are slidablyreceived; means'for detachably securing the bracket to the worksupporting table of a machine tool with the miter head base and itsassociated assembly slidable across the table; and means on themiterhead assembly for attaching the power feed of the machine tool thereto.

4..An attachment of the chara c ter described comprising:' a pair ofparallel rods; a cross member rigidly connecting the rods at one end ami ter head base rigidly connecting the rods at the.

. opposite end; a miter head'rotatably adjustable on said miter headbase; a work engaging member carried by the miterhejad'; a bracket inwhich the rods are slidably received; meansfordetachably securing thebracket to the 'work supporting'table of'a machine tool withthe miterhead base and its associated assembly slidable across the table; and afoot on the bottom of the miter head base adapted to rest on 'theworksupporting table to support the miter .head assembly at the properelevation. f .i N

HANSPE'I'ERSEN.

